Reset Firefox preferences to troubleshoot and fix problems.Troubleshoot and diagnose Firefox problems.See the following articles for solutions: Other possible causes include changes made to Firefox preference settings, which are not disabled in Troubleshoot Mode Safe Mode. If the problem still happens in Troubleshoot Mode Safe Mode, it is not being caused by an extension or theme. The problem happens in Troubleshoot Mode Safe Mode See Refresh Firefox - reset add-ons and settings for more information, before you choose this option.ĭiagnosing problems in Troubleshoot Mode Safe ModeĪfter you start Firefox in Troubleshoot Mode Safe Mode, you'll want to test its behavior and see if the problem goes away. Clicking the Refresh Firefox button will restore Firefox to its factory default state while saving your essential information.When you leave Troubleshoot Mode Safe Mode and start Firefox normally, your add-ons and other settings will return to the state they were in before you entered Troubleshoot Mode Safe Mode. Clicking the Start in Safe Mode Open button will start Firefox with the default theme, your extensions will be disabled, and some other features and customizations will be turned off.You may need to specify the Firefox installation path (e.g. quitting Firefox and then going to your Terminal and running: firefox -safe-mode holding down the option key while starting Firefox.

Note: You can also start Firefox in Safe Mode by holding down the shift key while starting Firefox.

Run ie in safe mode